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Old 01-08-2019, 05:30 AM
awmuhs's Avatar
awmuhs awmuhs is offline
Join Date: Jun 2013
Location: Tucson, Az
Posts: 134
Default RV12 and RV12 iS tailcone difference

Our teen building group, Southern Arizona Teen Aviation, is building 2 RV12ís

We received our first tailcone just before the iS version was released. Our second one was ordered after. We opted to order the iS fuselage and engine for the first airplane.

The second tailcone has an inspection opening and cover on the bottom that allows access to the filters, pumps and fuel drain mounted on the aft side of baggage bulkhead. The first tailcone does not have the opening.

We fabricated an opening for the first tailcone prior to mating the fuselage and tailcone.

For those who had similar timing to ours you may want to consider adding the inspection opening. I am not sure how you would get to the fuel drain otherwise.
Alan Muhs
Tucson, Arizona
Dues overpaid December 17, 2018
RV12 Southern Arizona Teen Aviation: wings, empennage & tail cone completed. Fuselage 90% complete, engine hung, waiting for avionics
RV10 flying since July 2014- 550 hrs as of Dec 2018
RV6A purchased and flying
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Old 01-08-2019, 07:24 AM
rolick22's Avatar
rolick22 rolick22 is offline
Join Date: Oct 2013
Location: Powell, OH
Posts: 133
Default F-01282-L-1

Yes good point, for all those who don't know, it's all based on what version on the fuselage you have, if you have the legacy fuselage then your good without the inspection hole. If you have the newer iS fuselage then you will have to have the cut out, punched out by Vans, or if you still have the older tail cone then you must make the hole from scratch. I had the old version with no inspection hole. I ordered a new F-01282-L-1(bottom left skin) and will remove and replace the old F-1282-L (bottom left skin). I know I could cut a hole but then it would not be the same because of the flange that is stamped into the part and will make the panel flush due to the factory made flange. It's got to add at least 20 knots do to less drag.
David Rohrlick
RV-12 Finished (Empennage, Fuselage(1st gen), and Wing kit)
Empennage finished (need to add the panel cut out)
Wings finished (need to add the left landing light)
iS Finishing Kit In work
iS Fuselage Finished
iS Engine Kit ordered
N112DR Reserved
VAF donation made for 2019
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Old 01-08-2019, 11:17 AM
greghughespdx greghughespdx is offline
Join Date: Nov 2011
Location: Aurora, OR
Posts: 536

Our engineering team made updates to the plans in Section 38iS/U (finish kit). The steps included there explain how to create the inspection hole are to be completed before mating the tail cone to the fuselage. Instructions and a template to address this are provided. You can of course purchase a new skin with the factory-punched hole, if you choose to do so. That's just a matter of preference.

On page 38iS/U-07:

NOTE: For early production tailcones without the access hole in the F-01282-L-1 Bottom Left Skin as shown in Figure 3, go to Page 38iS/U-23 for instructions to include the access hole.
And on page 38iS/U-23:

NOTE: The oval hole in the F-1282-L Bottom Left Skin provides
access to the fuel drain for RV-12iS installations and to the
gascolator for RV-12 ULS installations. The template for the hole
is found on Page 38iS/U-25, Figure 3. Use the call-outs in Figure
1 and on the template to complete the steps on this page.

Step 1: Position the template on the skin and secure with tape.

Centerpunch two of the four #19 holes.

Cut the template along the edge of the hatched area using a razor
blade to score the skin beneath. Remove the template.

Step 2: Drill the two holes per the call-outs. Use the F-01282A
(RV-12iS) or F-01282B (RV-12 ULS) Cover Plates as a guide to drill
the remaining two holes.

Cut out the oval shaped hole in the skin.

Use the nutplates shown on Page 38iS/U-07, Figure 3 as drill guides
to match-drill #40 the nutplate attach holes, then deburr.

Step 3: Return to Page 38iS/U-07, Step 3.
The plans and template are available on the Van's web site in the RV-12iS Service Info Revisions and Changes section, here's the direct link to the file:

Hope that helps!

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Opinions, information and comments posted by me are my own unless stated otherwise. They do not represent direction/opinions of my employer.

Building RV-8A since Sept 2014 (N88VX reserved)
Dual AFS 5600, Avidyne IFD 440, Whirlwind 74RV, Superior XPIO-360
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Flying spam can, helped build/fly a few RV-12s and some other RVs
Hillsboro, OR (EAA 105)

Last edited by greghughespdx : 01-08-2019 at 11:22 AM.
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